add initial Blackwell support

[kushanam]

Adding initial Blackwell support. Note that CUTLASS commit for 3.8 tag is not cut yet.
for the commit see NVIDIA/cutlass@389e493

[github-actions]

👋 Hi! Thank you for contributing to the vLLM project.
Just a reminder: PRs would not trigger full CI run by default. Instead, it would only run fastcheck CI which starts running only a small and essential subset of CI tests to quickly catch errors. You can run other CI tests on top of those by going to your fastcheck build on Buildkite UI (linked in the PR checks section) and unblock them. If you do not have permission to unblock, ping simon-mo or khluu to add you in our Buildkite org.

Once the PR is approved and ready to go, your PR reviewer(s) can run CI to test the changes comprehensively before merging.

To run CI, PR reviewers can do one of these:

• Add ready label to the PR
• Enable auto-merge.

🚀

[mergify]

This pull request has merge conflicts that must be resolved before it can be
merged. Please rebase the PR, @kushanam.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

[pacoxu]

vllm/CMakeLists.txt

Lines 97 to 100 in 7ef5873

	set(CUDA_SUPPORTED_ARCHS "7.5;8.0;8.6;8.7;8.9;9.0;10.0;11.0;12.0")
	elseif(DEFINED CMAKE_CUDA_COMPILER_VERSION AND
	CMAKE_CUDA_COMPILER_VERSION VERSION_GREATER_EQUAL 12.8)
	set(CUDA_SUPPORTED_ARCHS "7.0;7.2;7.5;8.0;8.6;8.7;8.9;9.0;10.0;10.1;12.0")

already updated.

[pacoxu]

vllm/CMakeLists.txt

Line 311 in 7ef5873

set(CUTLASS_REVISION "v4.2.1")